Toworkwiththemachine，youmustreadtheinstructionscarefully.（2.0分）
Toworkwiththemachine，youmustreadtheinstructionscarefully.（2.0分）
Towork______withthemachine,youmustreadtheinstructionscarefully. A: firstly B: naturally C: efficiently D: generally
Towork______withthemachine,youmustreadtheinstructionscarefully. A: firstly B: naturally C: efficiently D: generally
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